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14.07.2019 •
Physics
What is the potential energy of a 10kg child sleeping in her crib 1 meter above the ground?
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Ответ:
Potential energy of the child =98 J
Explanation:
mass of child= m= 10 kg
height= h= 1 m
acceleration due to gravity= g= 9.8 m/s²
Potential energy= PE= mgh
PE= 10 (9.8)(1)
PE= 98 J
Thus the potential energy of the child= 98 J
Ответ:
The answer is letter A, Susan can process wind speed data from different regions.
Explanation:
Doppler Effect- this is a mechanism of measuring the change in frequency of light, sound or waves from a source. The sources are then observed in relation to an observer.
Doppler Radar- this is a radar which specializes in Doppler effect. It provides velocity data of specific objects. Since velocity refers to the speed of an object in a specific direction, then this makes the answer letter A. Susan can process wind speed data from different regions. This means that, with the help of the Doppler radar, Susan will be able to gather the velocity data of wind in relation to specific directions from each region.